<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>标题文本</title>
</head>

<body>
<!-- 标题标签共有1-6级，字体从大到小 -->
<h1>一级标题标签</h1>
<h2>二级标题标签</h2>
<h3>三级标题标签</h3>
<h4>四级标题标签</h4>
<h5>五级标题标签</h5>
<h6>六级标题标签</h6>
</body>

</html>